Pump.



G. WALINDER.

PUMP.

A PPLIUATIOI FILED SEPT. 23,1912. 1 ,097,955. Patented May 26, 1914 I l i l lill/012301* ZU/messes NITED STATES OFFICE.

GUNNAR'WALINDER, or OIIIOAGO, ILLINOIS, AssIeNoR or 'Iwo-FIFTHS To BERT n. WALINDEB., .or cHI'cA'GO, ILLINOIS.

ZPUMP.

steunen-'tion or Letters 'ra-tem.

Patented May 26, 1914.

` application aieaiseptember 23,1912. rsoriai mi. 121,735.

To'all whomet mag/concern.' p

Be it known that il, :GUNNAR WAIAINDER,

i a .citizen er are United states, residing at Chicago, in the county of Cook and Starte of Illinois, .have invented certain new afnd useful Improvements in Pumps, of which 'the vfollowing is a specification.

M y invention relates to vpumps and e evciailly fto'double-acti-ng pumps for deep w f s.

In the ,prior art such pumps have fbeen constructed with two cylinders, or with a cylinder divided into itwo parts. According to my invention it is necessary to employ but one cylinder, and by so doing I ihave reduced the vnumber o'f valves necessary and have made i ossible a more simple construe` tion lusi-ng ewer parts. I

One Object of my invention is lto provide a double-action pump which is simple in construction and has few parts.

A further object is to provide imeans for easily and quickly -withdrawing the working parts :from the well for inspection and reair.

p A further object is to Aprovide a pump of this character having a single cylinder, and thus to produce a shorter and more compact construction.

A further object is to provide a pump construction in which the vcylinder and outer casing may be composed of ordinary piping.

In the accompanying drawings, Figure 1 is a vertical'central section of a pump embodying my invention. Fig. 2 is a view showing some of the working parts, the walls of the cylinder and pump casing being cut away. Fig. B is a transverse sectional View taken on the line 3 3 of Fig; 1. Fig. 4 is a top ,plan view of the pump, the piston rod being shown in section.

In the present embodiment of the invention, the outer casing of the pump is composedof acylindrical pipe 1 which is screwthreaded at the top and bottom, a lower member 2 connected therewith, and an upper member 3 similarly connected at the upper end of the pipe 1. This outer portion, which is herein called the pump casing, is stationary below the bottom of an outiow pipe 4 which extends to thetop of the well. The pump casing isprovided near its upper portion with ports 4 for the purpose y-O'f permitting the inflow offliquid. Within this pump casing is a longitudinally movablecylinder 5 inclosing t e piston 6, and partially inclosing a valve cage 7.

The :pump Vcasing 'terminates below with the head 8 which is `provided with a conical openang to .receive .plug 9 wihich is correfspondmgily tapered and which may be .provided wit washers 10, .or other packing, 4to vinsure a liquid-tight joint. The plug 9 is vertically apertured :to permit the inflow of liquid into the cylinder, and terminates at its yupper extremity iin lthe valve seat 9, adapted to coperate with 4the valve 11. `This valve imay be tof any a proved form. In the embodiment selected dir illustration it is a ball, and is fheld iin lace 'by the valve cage 7 which iscoiinected` y a screw-thread with the upper pontion of fthe plug 9.

- The .piston 6 is jhollow and is composed of an upper member .6a -connected at its upiper extremity with vthe 4piston rod 21 and a lower member 12 connected with -the said upper member by screw-threads and forming at its upper :extremity a valve seat 12 adapted to cooperate with the valve 13 which may be ofany approved form. In -the embodiment showin, the valve 13 is a ball and is held in place above the -valve seat by the `hollow piston :member :6. The outer surface of the piston is provided .with aliquidtight packing which may consist vof vthe washersior cup .leathers 14, or'aiiy approved form of packing for such purpose. Above this packing and at the .lower extremity of the piston member 6 is an outwardly projecting flange 6b, which isadapted to aid in removing the cylinder of the pump `from the well, as hereinafter described. The lower portion of the piston ,member 12 land the upper portion of the cage 7 arecorrespondingly .screw-:threaded for a similar purpose,

las hereinafter described.

The upper end of the cylindrical pipe .1 is 4provided internally with a left-hand screw thread into which is screwed the annular head 115, which is vertically apertured and which is provided with .a valve seat lf1 adapted to coperate vwith 'the valve 16. The valve 16 is guided and held in position by the stem .16a and is limited in itsl movement by the valve cage 17; it may also be provided with a spring 18 to assist in holding `it in a closed position. The lower part p valve 16 and the valve cage 17 are vertically aperturedL to permit of the passage of the piston rod i1. That portieri of the piston t rod 21 which extends from the piston' i the movable cylinder o to a point above the 'valve cage 17 is yvertically apertured to permit the passagefof liquid from the interior of the hollow piston and has transverse openings 22 into the outflow pipe 4. 1

The cylinder 5 is provided at its upper extremity with an annular member 5a adapted to engage with the projecting flange 6b when the cylinder is to be raised from the well; and the lower extremity of the cylinder is provided with a similar annular member 5b which is adapted to embrace the lower portion of the valve cage 7 and serves to guide the cylinder in its `longitudinal movement. 1n operation, when the parts are in the lowermost position, that part of thef'pump casing and movable Ycylinder which is above lthe piston is filled with liquid through the apertures '1a. On the tip-stroke of the piston 5 is raised slightly by the friction of the piston until its upper `surface comes in contact with the lower surface of the annular head 15, thus closing the cylinder against the outflow of liquid. The further rise of the piston then forces the liquid above it past thefvalve 16 and into the outflow pipe 4; and, downward escape of liquid being prevented by the check valve 13, this causes an upward flow of the liquid in said pipe and a consequent delivery of liquid at the surface.

During the upward stroke of the piston the liquid rises through the vertical opening in the plug 9 past the valve 11 and through the apertures in the valve Cage 7 into the interior of the movable cylinder; so that when the parts are in the uppermost position that portion of the cylinder which is then below the piston is filled with liquid which is prevented from escaping in a downward direction by the valve 11. On the down-stroke of the piston this liquid is K therefore forced upwardly through the interior of the hollow piston, past the valve 13 and through the hollow portion of the` piston rod 21 and is delivered through the transverse openings 22 into the outflow pipe 4. This additional quantity of liquid, being prevented from downward escape by the valve 1G, causes an upward flow of liquid in the outflow pipe and a consequent delivery at the surface. Hence, there is a pumping action both on the upward and downward stroke of the piston. During the downward stroke of the piston the movable cylinder 5 descends slightly and leaves open the top,

through which the liquid enters the cylinder for a repetition of the pumping action heretofore described.

I will now explain the use of the lugs 19 andQO and the screw-threads in the lower tion of the valve cage 7. During the operation of pumping, the movable parts will frequently become worn so that it is necessary to replace or repair them and to withdraw them from the well for that purpose. If it is desired to .withdraw the piston, it is raised as far as possible and then turned by means of the piston rod 2 1 untilthe lugs 2O come into lateral engagement witlrth'e lugs 19, as shown in Fig. 3. By a'further turning movement of the piston ,rod the valve seat 15 may then be unscrewed from its left-hand thread engagement with the pump casing, when the piston and the annular member 15 and the parts supported there-r by may all be drawn to the top of the well through the outflow pipe 4. The projecting flange Gb, coming into engagement with the annular member 5, carries up with the piston the cylinder also.

1f it is desired to withdraw also the plug 9 and the parts which it supports, the piston is lowered until it comes in'contact with the top of the valve cage 7 when by a turning movement of the piston rod, as before, the interior screw-thread on the lower part of the piston engages with the exterior screw thread on the valve cage 7 thus permitting theI plug 9 and all the parts which it supports to be raised from the head 8.

When it is desired to reseat the parts in the pump casing, they may be lowered from the top of the well and fixed in their respective positions by reversing the operation above described.

I do not'desire to limit myself to the preci'se form herein shown, since the proportions, form and manner of construction may be varied without departing from the spirit and substance of my invention.

I claim as my invention:

1. A double-acting pump consisting of an outer pump casing, a longitudinally movable cylinder therein, means for permitting the inflow of liquid to said cylinder, a reciprocating hollow piston in said cylinder, a hollow piston rod connected with said piston 70 portion ofthe piston and on the upper pori on said head for the purpose of unscrewing its upperv and lower .ends'fand an outflow valve at its upper end; means for closing said lower inlet` port against the outflow of s liquid; a reciprocating cylinder within said casing adapted to closersaid upper inlet port; and a hollow .piston with. a hollow piston y rod adapted to Araise liquid through said outsaid pistonrod on the down stroke.

flow valve on the yupward stroke, and to forceliquid upwardthrough said piston and 4. Ina double-actingpump, in combination, a longitudinally movable cylinder; a reciprocating hollow piston withiny said cylinder; a pump casing exterior of said cylindercontaining liquid inlet ports; a tubular actuating jrod immovably attached to the Y said hollow piston having a liquid delivering opening above the said pump casing; a valve within lsaid hollow vpiston to prevent the downward Yiiow I'ofliquid'through said actuating rod kand cylinder, said pump casing having a port in'rits upper end for the exit of water from the upper end of said movable cylinder; and a valve to prevent downward flow through the last mentioned port.

5. In a double-acting pump, in combination, al pump casing; a longitudinally movable open-topped cylinder adapted to be closed on its upward movement by Contact with the head of the pump casing; a hollow I piston working in said cylinder and arranged to reciprocate said cylinder; ahollow piston yrod connected with said piston and adapted tol convey liquid received through said piston to a point outside the pump casing; a check valve opening into said cylinder below said piston; an inlet port in said casino above said piston; a check valve in said holIow piston; and an outwardly-opening valve in the head of said cylinder above said piston.

G. A p-ump casing comprising a cylindrical pipe; a cylindrical bottom section connected therewith by screw-threads; a head connected with saidbottom section by screwthreads and apertured to receive avalvesupporting plug; a cylindrical/top section connected with said cylindrical pipe by screw-threads; and a valve-supporting head connected by screw-threads with said pipe.

7 In a pump, in combination, a pump cas-v ing comprising a cylindrical pipe, and a cylindrical bottom section and a cylindrical ltop section connected with said pipe by screw-threads; a vertically apertured head screwed into said bottom section; a vertically apertured plug seated in said head;a valve supported by said plug; a vertically apertured head connected by screw-threads to the upper end of saidpipe; a valve on said last mentioned head; a lon itudinally movable cylinder within said casing; and a piston working in said cylinder and adapted to reciprocate said cylinder.

8. In a double-acting pump, in combination, a pump casing; a longitudinally movable cylinder therein; areciprocating piston in said cylinder; means for delivering liquid into said cylinder alternately above and below said piston; and a check valve at the lower end of said casing adapted to prevent the escape of said liquid downwardly from said cylinder during the stroke of the piston.

9. In a double-acting pump, in combination, a longitudinally movable cylinder; a reciprocating hollow piston within said cylinder; a pump casing exterior of said cylinder containing liquid inlet ports; a tubular actuating rod attached to Vthe said hollow piston having a liquid delivering opening above said pump casing `and adapted to deliver liquid on the downward stroke of said piston; a Avalve in the pump casing above the piston adapted to permit the discharge of liquid on the upward stroke of said pissoV ton; and a ball-valve within said piston to Y. 

